I read here (on Hacker News) that the stool test is actually really valuable and cheap enough to pay out of pocket prior to trying to justify an out-of-schedule colonoscopy.
Gentle reminder for Australian folks here, you can get a bowel screening test kit for free, if you're between 45 - 74 years of age.
https://www.health.gov.au/our-work/national-bowel-cancer-scr...
Is it at home ones or ones that you send sample to get sequenced?
Not to mention the prepare for a colonoscopy is not pleasant.